| 摘要 |
A tractor recoil mechanism for maintaining tension of the track includes a cylinder having a sleeve piston movably disposed therein, associated with a rear frame portion. A rod member, disposed within the sleeve piston to form therewith a closed chamber with the cylinder means, extends through an open end of the cylinder means. A helical spring acts between the sleeve piston and reaction means associated with a front frame portion to urge them apart. Recoil movement of the front portion in one direction relative to the rear portion moves the rod therewith, so that, with the chamber filled with incompressible fluid, the sleeve piston moves in the opposite direction relative to the cylinder means, with compressive movement of the helical spring being greater than the amount of movement of the front portion toward the rear portion. Vent means associated with the chamber allow introduction of substantially incompressible fluid therein while air may be properly vented therefrom.
|
